- rumpus
- reluctivity
- reflectivity
- rose globe lily
- religion
- religious belief
- role player
- red tide
- rubefacient
- raoulia australis
- raoulia lutescens
- Rosmarinus officinalis
- redroot
- red fox
- ram's horn
- root celery
- richweed
- rue
- rocket salad
- rayless chamomile
- red periwinkle
- rock purslane
- red cole
- rattlebox
- rose periwinkle
- roquette
- rosinweed
- rocket
- rhubarb
- rhubarb plant
- regret
- rattlesnake orchid
- rosebud orchid
- Rhapis
- Roystonea
- Raphia
- Rhyncostylis
- retail merchant
- rug merchant
- resident
- repeater
- regular
- royalty
- remise
- reptile family
- robe_de_chambre
- robert
- retarding force
- romper
- reversible